The best business VoIP services in 2026: Expert tested and reviewed


Voice over Internet Protocol (VoIP) phone systems are now considered the standard if you want to attract customers. Users expect a range communication methods including phone lines, text and app messaging, and video conferencing. There’s not much that is more frustrating than being stuck in a phone queue with a poor-quality line. This is where VoIP solutions shine as convenient, often affordable, scalable, and bolstered by smart features such as smart routing or AI. 

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Whether you’re looking for VoIP, text messaging, video conferencing, collaborative tools, or an entry-level solution suitable for a growing business, there is a massive range of providers. These are the best providers on the market that combine business calling with advanced features, scalability, and value for money.

In ZDNET’s February update, we completed an overhaul of our guide for 2026, including a refresh of the services we recommend. 

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What is the best business VoIP provider right now?

ZDNET’s top recommendation for a business VoIP provider is RingCentral. Available from $20 per user per month, RingCentral provides a high-quality VoIP service that businesses of almost any size will appreciate. It also offers valuable optional extras like AI transcription. 

If you’re a smaller business looking for a VoIP service that provides the essentials, you could opt for DialPad‘s service instead. This is a more affordable option at $15 per seat per month, and it still excels at the basics. 

Also: The best password managers for businesses: Expert tested

When I compiled my top choices, I sought out the experiences of ZDNET authors and users themselves. I also considered the reputation and history of each VoIP provider on our list ensuring that I only selected vendors who provide the services and features businesses need today. 

The best business VoIP Services of 2026

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RingCentral

RingCentral

RingCentral is one of the most well-known and respected VoIP services in the US, making it one of my top choices for 2026.

Why we like it: Used by more than 400,000 businesses worldwide, RingCentral provides team messaging and collaboration tools, text messaging, call quality analytics, fax, call recording, cloud storage, and even an AI-backed transcription service.

RingCentral provides more than just a VoIP phone system. You can take advantage of a huge variety of additional extras. After you create a free account, you can set up a business line with your existing phone number, create a new, business-only line, or select a toll-free number.

The company is interested in applying AI and has rolled out smart features utilizing large language models, including call routing and quality improvement. 

Who’s it for: Business users may find this option particularly interesting, especially if they are on the smaller side. Customer feedback on call quality indicates that it is generally reliable, although some customers reported call drops. 

RingCentral’s IP phones only require a 90kbps connection, but if you are having issues, it’s worth investigating whether or not end-user hardware is appropriate. In addition, check whether your internet speed can support the right number of phones. You can test capacity here.

Plans start at $15 per user per month. The entry-level plan includes domestic calling, SMS texting, HD meetings, voicemail, as well as Google and Microsoft integrations. Premium plans begin from $20 per user per month.

Who should look elsewhere: Customers say they like the features and services on offer, but many feel that billing practices could be improved. Furthermore, customer service needs improvement. If you think you will need frequent on-call support, this likely isn’t the best option for you.  

RingCentral features: Variety of line options | Video meetings | Team collaboration suite | Mobile apps | AI tools including greetings, call routing | Mobile app | 24/7 support (mixed reviews) | Trustpilot rating: 1.9/5


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8x8

8×8

If call quality is your top priority, consider 8×8’s VoIP services. It’s gathered solid customer reviews related to call quality, soft phone usage, and interoperability.

Why we like it: 8×8’s website and sales approach could do with an overhaul, especially when you consider that many competitors are transparent about pricing. Given its high levels of positive reviews for call quality, 8×8 is still a top contender in the VoIP space. 

8×8 focuses on unified communications, offering customers the chance to go beyond VoIP. These expansion opportunities include adopting multi-channel and global support, call center and agent functionality, appointment scheduling, collaborative tools, AI, and centralized management via an admin console. 

You can also set up a Private Branch Exchange (PBX), which allows you to create an internal switchboard as well as accept calls from outside the network.

Improvements made to the service over the past year include AI tool integration to improve productivity, enhancements to workforce management solutions, and analytics.

Who’s it for: A number of small to medium-sized businesses will find this solution meets their needs, but it should be noted that a vast number of complaints relate to 8×8 support. Still, if call quality is king, 8×8 might be your best bet.

Who should look elsewhere: Anyone who is new to VoIP services might find that the support does not adequately meet their requirements, and so you might be better off with a different solution. 

Furthermore, a definitive price requires you to contact sales, although reports suggest pricing begins at roughly $24 per user per month, depending on customer needs. This lack of transparency may deter some users. 

8×8 features: Custom plans | Enterprise-grade features | Robust APIs | Business app integration | Multi-channel | Mobile compatibility | AI tools including Agentic CX


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DialPad

DialPad

If you’re interested in harnessing artificial intelligence for your VoIP needs, check out DialPad. 

Why we like it: DialPad is affordable and focuses on AI applications to improve productivity, streamline operations, and manage customer relationships. You can use AI to help you manage call and meeting summaries, as well as call transfers, and post-call surveys, team coaching, live call categorization, and to develop business-related responses to queries. 

AI-based “assist cards” are also available to help your operators in real-time.

Who’s it for: This service describes itself as a communications platform but focuses on streamlining VoIP, business operations, and customer support through artificial intelligence. 

While customer feedback on support is a mixed bag, users note the intuitive nature of the platform and its excellent features. This is the ideal option for customers seeking to discover how AI-based VoIP can benefit their businesses. 

Who should look elsewhere: DialPad’s pricing begins at $15 per user per month. However, the basic plan is limited. 

If you want features like customer relationship management software integrations, single sign-on (SSO), or Microsoft Teams integration, you must opt for a package starting at $25 per user per month or look elsewhere.

DialPad features: AI-focused | CRM integrations | Call transcription | Messaging services | Video meeting | CRM integration | Analytics and reporting | Enterprise plans available | Quick launch service | Trustpilot rating: 4.1/5


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Intermedia Unite

Intermedia Unite

If you plan to use a VoIP service for collaboration and business purposes — especially in the Microsoft ecosystem — you will want to explore the features offered by Intermedia Unite.

Why we like it: Intermedia Unite sports stand-out features such as mobile and desktop apps, auto-attendance, call transfers, three-way calling, voicemail transcription, archiving, team chat, video meetings, and analytics, making it an all-rounder option for VoIP use cases. 

It’s particularly useful for Microsoft Teams users, with a standalone plan available for Teams and collaborative use. 

In terms of integrations, you can use Intermedia Unite with third-party apps such as Slack, Chrome, Zoho CRM, Salesforce, and Zendesk. 

In recent months, the company introduced a zero-cost migration service and an AI supervisor assistant for business users.

Who’s it for: Considering this service’s focus on interoperability and smart features, I consider it one of the best options for most users, especially if your business is part of the Microsoft ecosystem. 

Customers like the reliability and call quality of the VoIP service and note that there is rarely any downtime. 

Two plans are available: Unite Pro and Unite Enterprise. Plans start at $28 per user per month, but keep in mind that some features — including AI assistance and video conferencing — are only available on premium plans. This higher tier starts at $33 per user per month.

Free desk phones or headsets are available to new customers. 

Who should look elsewhere: If you want a broader range of plans or something more budget-friendly, check out my other picks.

Intermedia Unite features: Free calling to 33 countries | Mobile support | Mix and match licensing | Three-way calling | Spam blocking | HD video meetings | CRM integration | AI coaching | Trustpilot rating: 4.1/5


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Nextiva

Nextiva

Nextiva is a great VoIP option if you’re looking for a solution focused on multi-channel support with the flexibility for hybrid and remote work.

Why we like it: According to Nextiva, their “AI-powered Unified-CXM platform delivers personalized experiences throughout the entire customer journey.” 

In short, the company specializes in multi-channel customer support and services.

Customers now expect businesses to offer multiple communication channels, not just traditional phone lines. As such, even Nextiva’s basic plans — Digital and Core — include calls to the US and Canada, social media channels, messaging apps, SMS, email, and web chat. To help budding startups, Nextiva monitors review sites, forums, and blogs for brand-associated content.

Consider Nextiva digital communication first, VoIP second. 

Who’s it for: It’s an excellent option for multi-channel support, including VoIP, although you must choose the right plan for toll-free numbers, routing, and callbacks. Customers generally applaud the Nextiva onboarding service and appreciate the support on offer.

Subscriptions begin at $25 per user per month on the Nextiva Engage plan. The company also offers Core, a cheaper alternative solution at $15 per user per month. 

Who should look elsewhere: Nextiva has another plan, NextivaONE. This is potentially a better option if you are an emerging business and you want to keep a tight rein on costs. For the equivalent of $15 per user per month, the annual plan — suitable for up to 10 seats — includes business calling, texting, video meetings, contact routing, and social media tools. 

Nextiva features: Unified comms: social media channels, messaging apps, and more | Toll-free numbers | Skill-based routing | AI workflows | Video meetings | Payment gateways | New customer promotions | Trustpilot rating: 4.7/5


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Voice over Internet Protocol (VoIP) allows you to make a phone call through the internet rather than traditional phone lines, also known as analog lines.

If you’ve already used WhatsApp calling or Zoom, you have used a VoIP system. Your voice is translated into data and then converted back into sound, a regular phone signal, before it reaches an end device. Typically, you will need an internet connection, a router, and a device capable of handling VoIP communications such as a dedicated VoIP handset, a smartphone, or a PC.

VoIP is gradually replacing analog Private Branch Exchange (PBX) systems, used by companies to operate phone switchboards and extension numbers. VoIP services can reduce the cost associated with physical lines. They also utilize the cloud to scale up capacity as well as handle internal, domestic, and international calls. 

VoIP is also very useful for hybrid and remote working setups, as VoIP-ready phones or apps can replace traditional office phone lines. 


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Below, you will find some of the most important factors to help you decide on the best VoIP option for you in 2026.

Business VoIP provider

Cost (starts at)

Call quality feedback

Video conferencing

AI

RingCentral

$20 per user per month

Excellent

Yes

Yes

8×8

$24 per user per month

Excellent

Limited by plan

Limited by plan

DialPad

$15 per user per month

Good 

Limited by plan

Yes

Intermedia Unite

$23 per user per month

Good

Limited by plan

Limited by plan

Nextiva

$15 per user per month

Good

Limited by plan

Limited by plan


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Choose this business VoIP provider…

If you want or need…

RingCentral

The best business VoIP provider overall. RingCentral goes beyond basic VoIP and provides employee tools, artificial intelligence, and more. Over 400,000 businesses have signed up for its straightforward approach to voice calling.

8×8

The best business VoIP provider for call quality. 8×8 is pushing toward the enterprise market and omnichannel functionality. It is also rapidly exploring the applications of AI for workforce management and data analytics. 

DialPad

An AI-first VoIP solution. DialPad leverages automation and AI to help you manage calls, meetings, analytics, and feedback. If you want to automate communication and streamline customer communication, this option is the way forward. 

Intermedia Unite

A feature-rich, reasonably priced VoIP option geared toward Microsoft Teams. You can take advantage of VoIP, video conferencing, AI, analytics, and a range of call center features. This solution should be on your radar if you’re a fan of the Microsoft ecosystem.

Nextiva

A multi-channel VoIP solution suitable for remote work. Nextiva’s modern approach will likely appeal to startups and small businesses, especially those that want to stick to a strict budget. 


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While compiling the list of the best VoIP providers in 2026, I considered the following factors:

  • Scalability: VoIP services suitable for business users must be scalable. There’s no point in starting small to cap costs and then being unable to expand as your business grows. I prefer to showcase solutions that allow customers to scale up or down as their requirements change. 
  • Cost: Ongoing costs are a factor when a business makes any form of investment. The VoIP providers I have chosen must meet different budgetary needs and, preferably, will offer a variety of plans.
  • Features: I want to see VoIP providers offer more than barebones service. I have included solutions that provide features like transcription, video conferencing, chat, and analytics. 
  • Mobile: Mobile connectivity is a staple for communication today, and it is important that VoIP providers offer customers some form of mobile support.
  • AI: In general, I like to see VoIP providers leverage new and emerging technologies in interesting ways. Regarding VoIP, features like AI-assisted transcription or sentiment analysis can be a real benefit for customers.
  • Support: With any business service, you expect some form of customer support, whether via chat, email, phone, or live help. The best options will provide a variety of channels for customer troubleshooting, although, unfortunately, many VoIP services aren’t known for great customer support.
  • Customer feedback: I have examined and researched each VoIP provider to learn how existing customers feel about the services provided. I prefer to see an established pedigree of happy clients, solid support, and feedback taken into consideration by providers themselves.


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If you’re considering replacing a traditional analog setup or starting off with VoIP, consider these VoIP features and what the most important aspects are for your business.

  • Call management: You might want an automated or smart system to handle call routing and processing. This could include virtual waiting rooms, voicemail and transcription services, grouping, and messaging. 
  • Capacity: Consider whether you need high-volume capacities for your VoIP system. A benefit of VoIP is that it is generally scalable based on the number of seats you require and how many calls you expect to handle. 
  • Reach: Some VoIP services are limited to domestic calling, such as within the U.S. and Canada only, and others may charge for international calling. Many businesses now also prefer softphone capacity, which allows customers to reach out through mobile and PC apps and software.
  • Call quality: Call quality should feature as a prominent aspect of any VoIP service you select. If your VoIP setup will be constantly used, you should opt for a solution with robust audio, low downtime, and low drop rates. 
  • Advanced features: You might also want to explore new technologies and innovations in the VoIP space, such as how AI and LLMs are being applied to call quality, sentiment measurements, or workflow automation. If these interest you, select a provider that is active in this arena. 


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In the same manner as many industries, VoIP providers are adopting artificial intelligence features to stay competitive and to lure in users with the promise of streamlined operations, automatic content generation, and improved data analytics. AI and large language models (LLMs) may also be used to optimize performance and manage traffic loads. 

You can find AI linked to automatic call transcription, for example, alongside implementations in customer assistance chatbots, environmental noise-cancelation — to improve call quality — and call routing. The latter may be able to help route customers to their desired location more efficiently. 

Sometimes it’s less artificial intelligence and more simply “smart” features in a shiny AI wrapper. So, it is worth taking new announcements with a pinch of salt before their true benefits and ROI can be measured. 


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Latest news in the VoIP, telecoms space

  • Easybell and Fonio.ai announced a voice AI solution designed for cloud-based phone systems based in the EU.
  • Voip Unlimited launched AI Meeting, a tool focused on analyzing video meetings for actionable data on consumer trends and sentiment. 
  • A new VoIP-based botnet is leveraging default passwords to compromise routers and internet-facing devices.
  • VoIP-Pal filed an antitrust lawsuit against Google, Apple, and Samsung, with AT&T, Verizon, and T-Mobile named as co-conspirators. The suit alleges the companies are involved in a coordinated effort to prevent competition in the standalone Wi-Fi Calling space.

Business communications firm Blueface suggests that around 35% of businesses worldwide have adopted some form of VoIP, with approximately 60% of organizations being open to the idea of phasing out traditional phone lines. 

The market is also expected to expand further, with researchers suggesting the market will grow to more than $236 billion in 2028.


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A benefit of VoIP is that it requires very little bandwidth. While the speed and reliability of your internet connection will determine the quality of a VoIP call, the Federal Communications Commission (FCC) estimates that a typical VoIP call only requires 0.5Mbps. This is far less than your typical YouTube video or social media visit. If you have a basic internet package, VoIP calling is likely possible.


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While VoIP can work with a minimal internet connection, it still needs one to operate because there is no offline functionality, unlike traditional analog systems. Weak connections will result in laggy calls with poor latency.

In addition, VoIP systems are likely usable during power outages and usually unsuitable for emergency situations. You should also consider the potential security ramifications of VoIP as they are more prone to cyberthreats than standard phone lines. 


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VoIP and Wi-Fi calling are similar in some respects but not the same. Wi-Fi calling is a smartphone feature that lets you make calls through your internet connection instead of using cellular services. In comparison, VoIP is a dedicated service that uses an available internet connection to make a call with a compatible device. 


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Yes, especially when you consider the cost savings element of these services. For example, it may be cheaper and quicker to set up VoIP than traditional phone lines in an office. This can provide more flexibility where employees work without relying on hardwired lines or hardware. VoIP services can also provide useful features such as video conferencing and collaborative tools. 


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Latest updates

  • January 2026: In ZDNET’s January update, we completed an overhaul of our guide for 2026, including a refresh of the services we recommend. 
  • July 2025: In ZDNET’s July update, we performed substantial editorial and layout updates. We also provided more information on our favorite alternative VoIP services. 
  • June 2025: In ZDNET’s June update, we performed significant editorial and layout changes.

Alternative business VoIP providers worth considering

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zoom app

Silas Stein/picture alliance via Getty Images)

Zoom operates an affordable VoIP service best suited to domestic calling. Features include U.S. and domestic calling, SMS messaging, online fax, workflow automation, and an AI companion for Zoom Phone. Plans start at $15 per user per month.


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Grasshopper

Grasshopper

Grasshopper provides a range of flexible phone plans for your business lines including custom and toll-free numbers. A solo line costs $14 per month, and there’s also a plan for small businesses that provides more phone numbers and unlimited extensions.


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Line2

Screenshot via ZDNET

Line2 is an option if you just want a single virtual line with the possibility of expansion later. This is a great way for small businesses to get started with VoIP without the need for complex hardware or a high start-up investment. Features include domestic and international calling, VM transcriptions, and call screening. You can sign up for a starter price of $8 per month on an annual plan or $10 per month.


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GoTo Connect

Screenshot via ZDNET

Consider GoTo Connect if you are interested in leveraging AI and automation for your call center operations. Features on offer include toll-free calling, multi-device support, call queues, SMS, an AI messaging assistant, and AI-based call summaries, transcription, and analysis. Reports suggest pricing currently ranges from around $25 to more than $30 per month. 


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If you would like to explore our other recommendations for business services, check out our favorite picks for business messaging apps, the best business plan software around, and our top choices for the best business internet service providers in 2026.





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Recent Reviews


In May 2024, we released Part I of this series, in which we discussed agentic AI as an emerging technology enabling a new generation of AI-based hardware devices and software tools that can take actions on behalf of users. It turned out we were early – very early – to the discussion, with several months elapsing before agentic AI became as widely known and discussed as it is today. In this Part II, we return to the topic to explore legal issues concerning user liability for agentic AI-assisted transactions and open questions about existing legal frameworks’ applicability to the new generation of AI-assisted transactions.

Background: Snapshot of the Current State of “Agents”[1]

“Intelligent” electronic assistants are not new—the original generation, such as Amazon’s Alexa, have been offering narrow capabilities for specific tasks for more than a decade. However, as OpenAI’s CEO Sam Altman commented in May 2024, an advanced AI assistant or “super-competent colleague” could be the killer app of the future. Later, Altman noted during a Reddit AMA session: “We will have better and better models. But I think the thing that will feel like the next giant breakthrough will be agents.” A McKinsey report on AI agents echoes this sentiment: “The technology is moving from thought to action.” Agentic AI represents not only a technological evolution, but also a potential means to further spread (and monetize) AI technology beyond its current uses by consumers and businesses. Major AI developers and others have already embraced this shift, announcing initiatives in the agentic AI space. For example:  

  • Anthropic announced an updated frontier AI model in public beta capable of interacting with and using computers like human users;
  • Google unveiled Gemini 2.0, its new AI model for the agentic era, alongside Project Mariner, a prototype leveraging Gemini 2.0 to perform tasks via an experimental Chrome browser extension (while keeping a “human in the loop”);
  • OpenAI launched a “research preview” of Operator, an AI tool that can interface with computers on users’ behalf, and launched beta feature “Tasks” in ChatGPT to facilitate ongoing or future task management beyond merely responding to real time prompts;
  • LexisNexis announced the availability of “Protégé,” a personalized AI assistant with agentic AI capabilities;
  • Perplexity recently rolled out “Shop Like a Pro,” an AI-powered shopping recommendation and buying feature that allows Perplexity Pro users to research products and, for those merchants whose sites are integrated with the tool, purchase items directly on Perplexity; and
  • Amazon announced Alexa+, a new generation of Alexa that has agentic capabilities, including enabling Alexa to navigate the internet and execute tasks, as well as Amazon Nova Act, an AI model designed to perform actions within a web browser.

Beyond these examples, other startups and established tech companies are also developing AI “agents” in this country and overseas (including the invite-only release of Manus AI by Butterfly Effect, an AI developer in China). As a recent Microsoft piece speculates, the generative AI future may involve a “new ecosystem or marketplace of agents,” akin to the current smartphone app ecosystem.  Although early agentic AI device releases have received mixed reviews and seem to still have much unrealized potential, they demonstrate the capability of such devices to execute multistep actions in response to natural language instructions.

Like prior technological revolutions—personal computers in the 1980s, e-commerce in the 1990s and smartphones in the 2000s—the emergence of agentic AI technology challenges existing legal frameworks. Let’s take a look at some of those issues – starting with basic questions about contract law.

Note: This discussion addresses general legal issues with respect to hypothetical agentic AI devices or software tools/apps that have significant autonomy. The examples provided are illustrative and do not reflect any specific AI tool’s capabilities.

Automated Transactions and Electronic Agents

Electronic Signatures Statutory Law Overview

A foundational legal question is whether transactions initiated and executed by an AI tool on behalf of a user are enforceable.  Despite the newness of agentic AI, the legal underpinnings of electronic transactions are well-established. The Uniform Electronic Transactions Act (“UETA”), which has been adopted by every state and the District of Columbia (except New York, as noted below), the federal E-SIGN Act, and the Uniform Commercial Code (“UCC”), serve as the legal framework for the use of electronic signatures and records, ensuring their validity and enforceability in interstate commerce. The fundamental provisions of UETA are Sections 7(a)-(b), which provide: “(a) A record or signature may not be denied legal effect or enforceability solely because it is in electronic form; (b) A contract may not be denied legal effect or enforceability solely because an electronic record was used in its formation.” 

UETA is technology-neutral and “applies only to transactions between parties each of which has agreed to conduct transactions by electronic means” (allowing the parties to choose the technology they desire). In the typical e-commerce transaction, a human user selects products or services for purchase and proceeds to checkout, which culminates in the user clicking “I Agree” or “Purchase.”  This click—while not a “signature” in the traditional sense of the word—may be effective as an electronic signature, affirming the user’s agreement to the transaction and to any accompanying terms, assuming the requisite contractual principles of notice and assent have been met.

At the federal level, the E-SIGN Act (15 U.S.C. §§ 7001-7031) (“E-SIGN”) establishes the same basic tenets regarding electronic signatures in interstate commerce and contains a reverse preemption provision, generally allowing states that have passed UETA to have UETA take precedence over E-SIGN.  If a state does not adopt UETA but enacts another law regarding electronic signatures, its alternative law will preempt E-SIGN only if the alternative law specifies procedures or requirements consistent with E-SIGN, among other things.

However, while UETA has been adopted by 49 states and the District of Columbia, it has not been enacted in New York. Instead, New York has its own electronic signature law, the Electronic Signature Records Act (“ESRA”) (N.Y. State Tech. Law § 301 et seq.). ESRA generally provides that “An electronic record shall have the same force and effect as those records not produced by electronic means.” According to New York’s Office of Information Technology Services, which oversees ESRA, “the definition of ‘electronic signature’ in ESRA § 302(3) conforms to the definition found in the E-SIGN Act.” Thus, as one New York state appellate court stated, “E-SIGN’s requirement that an electronically memorialized and subscribed contract be given the same legal effect as a contract memorialized and subscribed on paper…is part of New York law, whether or not the transaction at issue is a matter ‘in or affecting interstate or foreign commerce.’”[2] 

Given US states’ wide adoption of UETA model statute, with minor variations, this post will principally rely on its provisions in analyzing certain contractual questions with respect to AI agents, particularly given that E-SIGN and UETA work toward similar aims in establishing the legal validity of electronic signatures and records and because E-SIGN expressly permits states to supersede the federal act by enacting UETA.  As for New York’s ESRA, courts have already noted that the New York legislature incorporated the substantive terms of E-SIGN into New York law, thus suggesting that ESRA is generally harmonious with the other laws’ purpose to ensure that electronic signatures and records have the same force and effect as traditional signatures.  

Electronic “Agents” under the Law

Beyond affirming the enforceability of electronic signatures and transactions where the parties have agreed to transact with one another electronically, Section 2(2) of UETA also contemplates “automated transactions,” defined as those “conducted or performed, in whole or in part, by electronic means or electronic records, in which the acts or records of one or both parties are not reviewed by an individual.” Central to such a transaction is an “electronic agent,” which Section 2(6) of UETA defines as “a computer program or an electronic or other automated means used independently to initiate an action or respond to electronic records or performances in whole or in part, without review or action by an individual.” Under UETA, in an automated transaction, a contract may be formed by the interaction of “electronic agents” of the parties or by an “electronic agent” and an individual. E-SIGN similarly contemplates “electronic agents,” and states: “A contract or other record relating to a transaction in or affecting interstate or foreign commerce may not be denied legal effect, validity, or enforceability solely because its formation, creation, or delivery involved the action of one or more electronic agents so long as the action of any such electronic agent is legally attributable to the person to be bound.”[3] Under both of these definitions, agentic AI tools—which are increasingly able to initiate actions and respond to records and performances on behalf of users—arguably qualify as “electronic agents” and thus can form enforceable contracts under existing law.[4]

AI Tools and E-Commerce Transactions

Given this existing body of statutory law enabling electronic signatures, from a practical perspective this may be the end of the analysis for most e-commerce transactions. If I tell an AI tool to buy me a certain product and it does so, then the product’s vendor, the tool’s provider and I might assume—with the support of UETA, E-SIGN, the UCC, and New York’s ESRA—that the vendor and I (via the tool) have formed a binding agreement for the sale and purchase of the good, and that will be the end of it unless a dispute arises about the good or the payment (e.g., the product is damaged or defective, or my credit card is declined), in which case the AI tool isn’t really relevant.

But what if the transaction does not go as planned for reasons related to the AI tool? Consider the following scenarios:

  • Misunderstood Prompts: The tool misinterprets a prompt that would be clear to a human but is confusing to its model (e.g., the user’s prompt states, “Buy two boxes of 101 Dalmatians Premium dog food,” and the AI tool orders 101 two-packs of dog food marketed for Dalmatians).
  • AI Hallucinations: The user asks for something the tool cannot provide or does not understand, triggering a hallucination in the model with unintended consequences (e.g., the user asks the model to buy stock in a company that is not public, so the model hallucinates a ticker symbol and buys stock in whatever real company that symbol corresponds to).
  • Violation of Limits: The tool exceeds a pre-determined budget or financial parameter set by the user (e.g., the user’s prompt states, “Buy a pair of running shoes under $100” and the AI tool purchases shoes from the UK for £250, exceeding the user’s limit).
  • Misinterpretation of User Preference: The tool misinterprets a prompt due to lack of context or misunderstanding of user preferences (e.g., the user’s prompt states, “Book a hotel room in New York City for my conference,” intending to stay near the event location in lower Manhattan, and the AI tool books a room in Queens because it prioritizes price over proximity without clarifying the user’s preference).

Disputes like these begin with a conflict between the user and a vendor—the AI tool may have been effective to create a contract between the user and the vendor, and the user may then have legal responsibility for that contract.  But the user may then seek indemnity or similar rights against the developer of the AI tool.

Of course, most developers will try to avoid these situations by requiring user approvals before purchases are finalized (i.e., “human in the loop”). But as desire for efficiency and speed increases (and AI tools become more autonomous and familiar with their users), these inbuilt protections could start to wither away, and users that grow accustomed to their tool might find themselves approving transactions without vetting them carefully. This could lead to scenarios like the above, where the user might seek to void a transaction or, if that fails, even try to avoid liability for it by seeking to shift his or her responsibility to the AI tool’s developer.[5] Could this ever work? Who is responsible for unintended liabilities related to transactions completed by an agentic AI tool?

Sources of Law Governing AI Transactions

AI Developer Terms of Service

As stated in UETA’s Prefatory Note, the purpose of UETA is “to remove barriers to electronic commerce by validating and effectuating electronic records and signatures.” Yet, the Note cautions, “It is NOT a general contracting statute – the substantive rules of contracts remain unaffected by UETA.”  E-SIGN contains a similar disclaimer in the statute, limiting its reach to statutes that require contracts or other records be written, signed, or in non-electronic form (15 U.S.C. §7001(b)(2)). In short, UETA, E-SIGN, and the similar UCC provisions do not provide contract law rules on how to form an agreement or the enforceability of the terms of any agreement that has been formed.

Thus, in the event of a dispute, terms of service governing agentic AI tools will likely be the primary source to which courts will look to assess how liability might be allocated. As we noted in Part I of this post, early-generation agentic AI hardware devices generally include terms that not only disclaim responsibility for the actions of their products or the accuracy of their outputs, but also seek indemnification against claims arising from their use. Thus, absent any express customer-favorable indemnities, warranties or other contractual provisions, users might generally bear the legal risk, barring specific legal doctrines or consumer protection laws prohibiting disclaimers or restrictions of certain claims.[6]

But what if the terms of service are nonexistent, don’t cover the scenario, or—more likely—are unenforceable? Unenforceable terms for online products and services are not uncommon, for reasons ranging from “browsewrap” being too hidden, to specific provisions being unconscionable. What legal doctrines would control during such a scenario?

The Backstop: User Liability under UETA and E-SIGN

Where would the parties stand without the developer’s terms? E-SIGN allows for the effectiveness of actions by “electronic agents” “so long as the action of any such electronic agent is legally attributable to the person to be bound.” This provision seems to bring the issue back to the terms of service governing a transaction or general principles of contract law. But again, what if the terms of service are nonexistent or don’t cover a particular scenario, such as those listed above. As it did with the threshold question of whether AI tools could form contracts in the first place, UETA appears to offer a position here that could be an attractive starting place for a court. Moreover, in the absence of express language under New York’s ESRA, a New York court might apply E-SIGN (which contains an “electronic agent” provision) or else find insight as well by looking at UETA and its commentary and body of precedent if the court isn’t able to find on-point binding authority, which wouldn’t be a surprise, considering that we are talking about technology-driven scenarios that haven’t been possible until very recently.

UETA generally attributes responsibility to users of “electronic agents”, with the prefatory note explicitly stating that the actions of electronic agents “programmed and used by people will bind the user of the machine.” Section 14 of UETA (titled “Automated Transaction”) reinforces this principle, noting that a contract can be formed through the interaction of “electronic agents” “even if no individual was aware of or reviewed the electronic agents’ actions or the resulting terms and agreements.” Accordingly, when automated tools such as agentic AI systems facilitate transactions between parties who knowingly consent to conduct business electronically, UETA seems to suggest that responsibility defaults to the users—the persons who most immediately directed or initiated their AI tool’s actions. This reasoning treats the AI as a user’s tool, consistent with the other UETA Comments (e.g., “contracts can be formed by machines functioning as electronic agents for parties to a transaction”).

However, different facts or technologies could lead to alternative interpretations, and ambiguities remain. For example, Comment 1 to UETA Section 14 asserts that the lack of human intent at the time of contract formation does not negate enforceability in contracts “formed by machines functioning as electronic agents for parties to a transaction” and that “when machines are involved, the requisite intention flows from the programming and use of the machine” (emphasis added).

This explanatory text has a couple of issues. First, it is unclear about what constitutes “programming” and seems to presume that the human intention at the programming step (whatever that may be) is more-or-less the same as the human intention at the use step[7], but this may not always be the case with AI tools. For example, it is conceivable that an AI tool could be programmed by its developer to put the developer’s interests above the users’, for example by making purchases from a particular preferred e-commerce partner even if that vendor’s offerings are not the best value for the end user. This concept may not be so far-fetched, as existing GenAI developers have entered into content licensing deals with online publishers to obtain the right for their chatbots to generate outputs or feature licensed content, with links to such sources. Of course, there is a difference between a chatbot offering links to relevant licensed news sources that are accurate (but not displaying appropriate content from other publishers) versus an agentic chatbot entering into unintended transactions or spending the user’s funds in unwanted ways. This discrepancy in intention alignment might not be enough to allow the user to shift liability for a transaction from a user to a programmer, but it is not hard to see how larger misalignments might lead to thornier questions, particularly in the event of litigation when a court might scrutinize the enforceability of an AI vendor’s terms (under the unconscionability doctrine, for example). 

Second, UETA does not contemplate the possibility that the AI tool might have enough autonomy and capability that some of its actions might be properly characterized as the result of its own intent. Looking at UETA’s definition of “electronic agent,” the commentary notes that “As a general rule, the employer of a tool is responsible for the results obtained by the use of that tool since the tool has no independent volition of its own.” But as we know, technology has advanced in the last few decades and depending on the tool, an autonomous AI tool might one day have much independent volition (and further UETA commentary admits the possibility of a future with more autonomous electronic agents). Indeed, modern AI researchers have been contemplating this possibility even before rapid technological progress began with ChatGPT.

Still, Section 10 of UETA may be relevant to some of the scenarios from our bulleted selection of AI tool mishaps listed above, including misunderstood prompts or AI hallucinations. UETA Section 10 (titled “Effect of Change or Error”) outlines the possible actions a party may take when discovering human or machine errors or when “a change or error in an electronic record occurs in a transmission between parties to a transaction.” The remedies outlined in UETA depend on the circumstances of the transaction and whether the parties have agreed to certain security procedures to catch errors (e.g., a “human in the loop” confirming an AI-completed transaction) or whether the transaction involves an individual and a machine.[8]  In this way, the guardrails integrated into a particular AI tool or by the parties themselves play a role in the liability calculus. The section concludes by stating that if none of UETA’s error provisions apply, then applicable law governs, which might include the terms of the parties’ contract and the law of mistake, unconscionability and good faith and fair dealing.

* * *

Thus, along an uncertain path we circle back to where we started: the terms of the transaction and general contract law principles and protections. However, not all roads lead to contract law. In our next installment in this series, we will explore the next logical source of potential guidance on AI tool liability questions: agency law.  Decades of established law may now be challenged by a new sort of “agent” in the form of agentic AI…and a new AI-related lawsuit foreshadows the issues to come.


[1] In keeping with common practice in the artificial intelligence industry, this article refers to AI tools that are capable of taking actions on behalf of users as “agents” (in contrast to more traditional AI tools that can produce content but not take actions). However, note that the use of this term is not intended to imply that these tools are “agents” under agency law.

[2] In addition, the UCC has provisions consistent with UETA and E-SIGN providing for the use of electronic records and electronic signatures for transactions subject to the UCC. The UCC does not require the agreement of the parties to use electronic records and electronic signatures, as UETA and E-SIGN do.

[3] Under E-SIGN, “electronic agent” means “a computer program or an electronic or other automated means used independently to initiate an action or respond to electronic records or performances in whole or in part without review or action by an individual at the time of the action or response.”

[4] It should be noted that New York’s ESRA does not expressly provide for the use of “electronic agents,” yet does not prohibit them either.  Reading through ESRA and the ESRA regulation, the spirit of the law could be construed as forward-looking and seems to suggest that it supports the use of automated systems and electronic means to create legally binding agreements between willing parties. Looking to New York precedent, one could also argue that E-SIGN, which contains provisions about the use of “electronic agents”, might also be applicable in certain circumstances to fill the “electronic agent” gap in ESRA. For example, the ESRA regulations (9 CRR-NY § 540.1) state: “New technologies are frequently being introduced. The intent of this Part is to be flexible enough to embrace future technologies that comply with ESRA and all other applicable statutes and regulations.”  On the other side, one could argue that certain issues surrounding “electronic agents” are perhaps more unsettled in New York.  Still, New York courts have found ESRA consistent with E-SIGN.  

[5] Since AI tools are not legal persons, they could not be liable themselves (unlike, for example, a rogue human agent could be in some situations). We will explore agency law questions in Part III.

[6] Once agentic AI technology matures, it is possible that certain user-friendly contractual standards might emerge as market participants compete in the space. For example, as we wrote about in a prior post, in 2023 major GenAI providers rolled out indemnifications to protect their users from third-party claims of intellectual property infringement arising from GenAI outputs, subject to certain carve-outs.

[7] The electronic “agents” in place at the time of UETA’s passage might have included basic e-commerce tools or EDI (Electronic Data Interchange), which is used by businesses to exchange standardized documents, such as purchase orders, electronically between trading partners, replacing traditional methods like paper, fax, mail or telephone. Electronic tools are generally designed to explicitly perform according to the user’s intentions (e.g., clicking on an icon will add this item to a website shopping cart or send this invoice to the customer) and UETA, Section 10, contains provisions governing when an inadvertent or electronic error occurs (as opposed to an abrogation of the user’s wishes).

[8] For example, UETA Section 10 states that if a change or error occurs in an electronic record during transmission between parties to a transaction, the party who followed an agreed-upon security procedure to detect such changes can avoid the effect of the error, if the other party who didn’t follow the procedure would have detected the change had they complied with the security measure; this essentially places responsibility on the party who failed to use the agreed-upon security protocol to verify the electronic record’s integrity.

Comments to UETA Section 10 further explain the context of this section: “The section covers both changes and errors. For example, if Buyer sends a message to Seller ordering 100 widgets, but Buyer’s information processing system changes the order to 1000 widgets, a “change” has occurred between what Buyer transmitted and what Seller received. If on the other hand, Buyer typed in 1000 intending to order only 100, but sent the message before noting the mistake, an error would have occurred which would also be covered by this section.”  In the situation where a human makes a mistake when dealing with an electronic agent, the commentary explains that “when an individual makes an error while dealing with the electronic agent of the other party, it may not be possible to correct the error before the other party has shipped or taken other action in reliance on the erroneous record.”



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